问题 解答题
选择合适的方法计算
10.8-0.8÷(0.35+0.05)8×[1÷(2.3-2.25)]
2.64×9.9+0.26418×(
1
6
+
1
3
-
1
2
答案

①10.8-0.8÷(0.35+0.05),

=10.8-0.8÷0.4,

=10.8-2,

=8.8;

②8×[1÷(2.3-2.25)],

=8×[1÷0.05],

=8×20,

=160;

③2.64×9.9+0.264,

=0.264×99+0.264,

=0.264×(99+1),

=0.264×100,

=26.4;

④18×(

1
6
+
1
3
-
1
2
),

=18×

1
6
+18×
1
3
-18×
1
2

=3+6-9,

=0.

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